What capacity does this vest actually hold?

Fifteen liters total. That's enough for layers, navigation tools, first aid, food for a long day, and either extended water bottles or an ice axe strapped to the outside. It won't fit overnight gear or a sleeping bag, but it handles everything needed for dawn-to-dark missions in variable terrain.

How do I choose the right size?

Measure your chest circumference at its widest point while wearing the base layer or shirt you'll typically run in. Match that measurement to the size chart provided by the manufacturer. A proper fit keeps the vest snug without restricting breathing when you're working hard.

Is this actually waterproof or just water-resistant?

The ALUULA fabric is highly water-resistant and the welded seams don't wick moisture the way stitched seams do, so it sheds rain and snow much better than traditional pack fabrics. It's not a sealed dry bag, but it protects your gear in wet conditions without adding waterproof liner weight.

Can I use this for trail running races?

Yes, especially for ultramarathons or mountain races with mandatory gear lists. The capacity and organization handle required safety equipment, extra layers, and extended water carries, while the vest harness keeps everything stable at race pace.

Pemi 15

The 3-second version

Welded ALUULA construction sheds water and eliminates stitched seams
Full-connection harness keeps load stable when moving fast over rough terrain
Contoured foam back panel distributes weight across your lower back
Requires chest measurement for proper fit
Low volume won't fit bulky overnight gear
Premium materials mean higher cost than standard daypacks

Why it's on GiftsFeed

Low-volume fastpacking vest built for extended off-trail days

Most running vests fall apart when you ask them to carry real gear, and most daypacks bounce around the moment you start moving quickly. This splits the difference: a vest harness that actually handles the weight of an ice axe or three liters of water without pulling you backward.

The welded construction matters because stitching is where packs let water through and where fabric tears under repeated stress. Thermo-welding the seams creates a continuous surface that stays watertight and holds its structure when you've stuffed it full and you're still hours from the trailhead.

Good gift when

Fastpackers tackling long alpine routes with variable conditions
Ultrarunners who need room for mandatory gear and extended water carries
People who move fast in mountains and need access to tools without stopping

Skip it if Sized by chest circumference, so you need accurate measurements before ordering

Specs

Capacity: 15 liters
Primary Material: ALUULA 97 with UHMWPE core
Construction: Thermo-welded seams
Harness Style: Full-connection running vest
Back Panel: Welded foam, contoured
Sizing Method: Chest circumference (Small, Medium, Large, X-Large)

If you're giving it

You'll need their size

Requires chest measurement, so best paired with a gift receipt or sizing consultation.

The details

This is a running vest for the kind of day that starts before dawn and ends well after you thought it would. The Pemi 15 carries fifteen liters in a harness that stays close to your body, built around welded construction and a back panel stiff enough to handle the weight of extra water bottles, an ice axe, or the shell you stripped off at treeline.

The fabric is ALUULA 97, an ultra-high-molecular-weight polyethylene core that sheds water and allows for thermo-welded seams instead of stitching. That means fewer places for rain to wick through and a pack body that holds its shape under load without the bulk of traditional sewn construction.

The full-connection harness wraps around your torso with air mesh panels that keep the pack from bouncing when you're moving fast over broken ground. Pockets ride on the shoulder straps and chest for bottles, gels, a phone, or anything else you need without breaking stride. The welded foam back panel follows the curve of your spine and distributes weight across your lower back, so the pack stays comfortable even when you've packed it full for a long alpine push.

This is for fastpackers who need more than a minimalist race vest but less than a full overnight pack. It handles the gear requirements of variable weather, technical terrain, and routes where you might be moving quickly one minute and scrambling the next. The low-volume design keeps everything stable and accessible without the swing and sag of a traditional daypack.

Hyperlite Mountain Gear

Pemi 15

Running-vest fit with room for ice tools, extended water, and layer changes

$250at hyperlitemountaingear.com

Choose an option

Quantity

Buy from Hyperlite Mountain Gear

Ships and sold by Hyperlite Mountain Gear. About this merchant

The 3-second version

Welded ALUULA construction sheds water and eliminates stitched seams
Full-connection harness keeps load stable when moving fast over rough terrain
Contoured foam back panel distributes weight across your lower back
Requires chest measurement for proper fit
Low volume won't fit bulky overnight gear
Premium materials mean higher cost than standard daypacks

Questions

What capacity does this vest actually hold?: Fifteen liters total. That's enough for layers, navigation tools, first aid, food for a long day, and either extended water bottles or an ice axe strapped to the outside. It won't fit overnight gear or a sleeping bag, but it handles everything needed for dawn-to-dark missions in variable terrain.
How do I choose the right size?: Measure your chest circumference at its widest point while wearing the base layer or shirt you'll typically run in. Match that measurement to the size chart provided by the manufacturer. A proper fit keeps the vest snug without restricting breathing when you're working hard.
Is this actually waterproof or just water-resistant?: The ALUULA fabric is highly water-resistant and the welded seams don't wick moisture the way stitched seams do, so it sheds rain and snow much better than traditional pack fabrics. It's not a sealed dry bag, but it protects your gear in wet conditions without adding waterproof liner weight.
Can I use this for trail running races?: Yes, especially for ultramarathons or mountain races with mandatory gear lists. The capacity and organization handle required safety equipment, extra layers, and extended water carries, while the vest harness keeps everything stable at race pace.